corbelling construction or "overhanging",
when each consecutive layer of stones reaches across the lower
layer, is in fact planar and can be seen in the cross section.
Theoretically it could serve to form a cylindrical arch, but
the first constructions were small and built from a circular
ground plan with corbelling used to significantly reinforce
the structure. Cross sections point out two layers: the internal
construction and outer framework, the latter serving as a
counterweight and roofing material. The internal structure
can be built only in one way, while possibilities for the
external structure are numerous.
Construction of the dry wall begins
with the wall, which is at first singular, double, conical
or composed. Interestingly the singular wall is exquisitely
accurately composed built just as the double wall, even though
it is a meter and forty centimetres high. The most practical
is the double bonded wall, which includes masonry (construction)
of both perimeter walls and in-filling, thus easing building
and quickening construction.
Corbelling is in principle a planar
construction overhanging in section, done by laying stones
on top of each other, with the higher layer overhanging the
lower one. The utility of such construction is its' very steep
pitch, thus counterweights on the outer side are built to
reduce the angle to some 60 degrees (on average).
wall: construction of the wall consists of longitudinal
and cross- layed stones, covered all the vertical
joints between them
The ground plan of corbelling
is circular: thus we avoid problems with corners or producing
All in all the section is triangular
and the ground plan circular, with corbelling providing an
exceptionally stabile and strong construction, which allows
compositions exceeding ten meters in diameter.
In professional building this is
the structure of the Atreus treasury, which is even larger,
but built systematically, with knowledge and partly carved
stone layers (thus presenting a cupola in its interior). The
difference between corbelling and cupolas is that in corbelling
layers are horizontal, graded, while in cupolas they perpendicularly
follow the construction plane.
is the principle of stratifying the stones in cross
section, in ground plan it is mostly circular
In corbelling only the internal,
load bearing construction is uniform, with the external
layer serving as a coat, which is individual, different and
expresses the builders intuition.